\usepackage[utf8]{inputenc}
\usepackage{amsmath}
\usepackage{eurosym}
\usepackage[Bjornstrup]{fncychap}
\usepackage{fancybox}
\usepackage{varioref} % vref vpageref
\usepackage{chapterbib} % referece in each chapter
\usepackage{tikz}
\usepackage{xcolor}
\usepackage{graphicx} 
\usepackage[colorlinks=true, citecolor=blue, linkcolor=blue]{hyperref}
\usepackage[titletoc]{appendix}
\usepackage{xeCJK}
\usepackage[square]{natbib}
\usepackage{xspace}
\usepackage{afterpage}

\newcommand{\ie}{\textit{i.\,e.}}

\newenvironment{dedication}
{   \thispagestyle{empty}
\vspace*{\stretch{2}}
\centering
}
{\par
    \vspace{\stretch{3}}
    \clearpage
}
